Quartiles: If the data is divided into four equal parts with three dividing points, then the dividing points are called Quartiles. The first dividing point is Q1 the second dividing point is Q2/Median and the third dividing point is Q3
Deciles: If the data is divided into ten equal parts with nine dividing points, the dividing points are called Deciles. They are denoted by D1, D2…D9
Similarly Percentiles can be defined.
